Ergilornis Ergilornis Ergilornis
Ergilornis
Ergilornis
Ergilornis

Ergilornis

Ergilornis (Eogruidae (Wetmore, 1934))

 

Class: Aves

Order: Struthioniformes

Family: Eogruidae

Time period: from the Eocene to Pliocene epochs (Eurasia)

Size: more than 1,6 m in height, 35 - 80 kg of weight

 

Eogruidae (also spelled Eogruiidae in some publications) is a family of large, flightless birds that occurred across Eurasia from the Eocene to Pliocene epochs. Related to modern cranes, limpkins and trumpeters, these birds converged strongly with ostriches due to similar speciations to cursoriality, even reducing their number of toes to two in some taxa. It has been suggested that competition from true ostriches has caused the extinction of these birds, though this has never been formally tested and several ostrich taxa do occur in the late Cenozoic of Asia and some species do occur in areas where ostrich fossils have also been found.
Most eogruids are known from rather sparse remains, mostly the tarso-metatarsals and toes. The former are generally slender with a distinct crest along the lateral side of the plantar surface. The trochlea for the second toe shows a progressive reduction along the various taxa, culminating in its utter absence in Amphipelargus.


Eogruids are almost universally accepted to be Gruiformes within the crane-limpkin-trumpeter line, Gruoidea, the exception being Olson 1985 which declared them to be stem-ostriches. A study in 2021 based on newly described remains found that eogruids and the related Ergilornithidae are indeed members of Struthoniformes. More derived taxa such as Ergilornis and Amphipelargus were sometimes classified as a separate family, Ergilornithidae, but they are now generally accepted to be a subfamily within Eogruidae.

Eogruids are rather similar to Geranoididae, a clade of similar flightless gruiforms from North America and Europe, and both groups have occasionally been classified as sister taxa. Recently geranoidids have been recovered as basal to the rest of Gruoidea, however, while eogruids are sister-taxa to cranes.

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Ergilornis (Eogruidae (Wetmore, 1934))

 

Class: Aves

Order: Struthioniformes

Family: Eogruidae

Time period: from the Eocene to Pliocene epochs (Eurasia)

Size: more than 1,6 m in height, 35 - 80 kg of weight

 

Eogruidae (also spelled Eogruiidae in some publications) is a family of large, flightless birds that occurred across Eurasia from the Eocene to Pliocene epochs. Related to modern cranes, limpkins and trumpeters, these birds converged strongly with ostriches due to similar speciations to cursoriality, even reducing their number of toes to two in some taxa. It has been suggested that competition from true ostriches has caused the extinction of these birds, though this has never been formally tested and several ostrich taxa do occur in the late Cenozoic of Asia and some species do occur in areas where ostrich fossils have also been found.
Most eogruids are known from rather sparse remains, mostly the tarso-metatarsals and toes. The former are generally slender with a distinct crest along the lateral side of the plantar surface. The trochlea for the second toe shows a progressive reduction along the various taxa, culminating in its utter absence in Amphipelargus.


Eogruids are almost universally accepted to be Gruiformes within the crane-limpkin-trumpeter line, Gruoidea, the exception being Olson 1985 which declared them to be stem-ostriches. A study in 2021 based on newly described remains found that eogruids and the related Ergilornithidae are indeed members of Struthoniformes. More derived taxa such as Ergilornis and Amphipelargus were sometimes classified as a separate family, Ergilornithidae, but they are now generally accepted to be a subfamily within Eogruidae.

Eogruids are rather similar to Geranoididae, a clade of similar flightless gruiforms from North America and Europe, and both groups have occasionally been classified as sister taxa. Recently geranoidids have been recovered as basal to the rest of Gruoidea, however, while eogruids are sister-taxa to cranes.

Відгуки (3):
Wilbert Friesen
31.01.2019
Fantastic !!!
The first one I've ever seen for this enigmatic species.
Митрич
09.12.2018
Ром, еще бы каких-нить занятных журавлеобразных - эогрусов, соногрусов, урмиорнисов в твоем исполнении увидеть! А так же вымерших аистов – мелкого позднемиоценового Ciconia minor из Кении, североамериканского крупного Ciconia maltha из позднего плиоцена – позднего плейстоцена, а так же Ciconia gaudryi из позднемиоцен-позднеплиоценовой эпохи Греции и Балкан (возможно, Малой Азии?). Первый кенийских аист мог у современного белого аиста между ног уместиться по росту, а современный белый аист так же ростом мог бы уместиться под брюхом у Ciconia maltha и Ciconia gaudryi. Концепции их окраса и размеров (по-моему, неплохие, но «акварельные») есть на сайте у ляхов «Ornitofrenia Piotr Gryz». Ром, если бы вы когда-нить смогли их сделать – после того на их другие «поделки» в Сети НИКТО БЫ БОЛЬШЕ СМОТРЕТЬ НЕ СТАЛ! Орнитологи бы только ваши работы искали…
Митрич
03.11.2018
Ура-а-а! Вот она -ШЕДЕВРА!!! Неплохо бы их в группе или в композиции с другими животными изобразить! А сколько шикарных вариантов можно сделать с разной интенсивностью пестрой, светлой или темной окраски, с черношейными самцами, с разноцветными ногами или клювами.